Finding the Fourth Proportional to 55,638.72, 82,961.78 and 49,456.80

Step by Step Solution

1. Step 1: Write the proportion equation
   55,638.72 : 82,961.78 = 49,456.80 : x
2. Step 2: Convert to fraction form
   55,638.72/82,961.78 = 49,456.80/x
3. Step 3: Cross multiply
   55,638.72x = 82,961.78 × 49,456.80
4. Step 4: Simplify right side
   55,638.72x = 4,103,024,161.10
5. Step 5: Solve for x
   x = 4,103,024,161.10/55,638.72
6. Step 6: Final answer
   x = 73,744.04